Annual Fuel Utilization Efficiency. A measure of a furnace's heating efficiency. The higher the AFUE%, the more efficient the product. The government's established minimum AFUE rating [..]

The portion of the central air conditioning or heat pump system that moves heated or cooled air throughout a home's ductwork. In some systems a furnace handles this function.

An outdoor temperature, usually between 30° F and 45° F, at which a heat pump's output exactly equals the heating needs of the home. Below the balance point, supplementary electric resistance [..]

British thermal unit. The amount of heat required to raise the temperature of one pound of water (about one pint) by one degree F.

The pump that moves the refrigerant from the indoor evaporator coil to the outdoor condensing unit and back to the evaporator. The compressor functions as the heart of the system, because it circulate [..]

A network of refrigerant-filled tubes where heat leaves the hot refrigerant vapor. The vapor then condenses into a liquid capable of absorbing more heat.

The portion of a heat pump or central air conditioning system that is located in the home and functions as the heat transfer point for warming or cooling indoor air.

An air conditioner that contains a valve that allows it to alternate between heating and cooling.

An air conditioner that contains a valve that allows it to alternate between heating and cooling.

A body of air or liquid from which heat is collected. With Coleman® heat pumps, the air outside the home is used as the heat source during the heating cycle.